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Enthalpy Based Boost Pressure Control
Linköping University, Department of Electrical Engineering, Vehicular Systems.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Entalpibaserad Laddtrycksstyrning (Swedish)
Abstract [en]

A turbo system is driven by the excess energy in the exhaust gases.  As a result, variation in exhaust temperature cause variations in  boost pressure. By using the information about the available exhaust  energy in the turbo controller directly through a feedforward  controller, an unexpected variation in turbo boost can be avoided. A  model based controller is developed that calculates the desired  turbine power from the boost pressure reference and then, by  observing the available exhaust energy, controls the generated  turbine power to match the desired power. A Mean Value Engine Model  has been used to make simulation with the developed controller  implemented. Steps between different boost pressure references are  used to evaluate controller performance. Tests in a car have also  been made to make sure the simulation results are consistent in a  real environment.

Abstract [sv]

Turbosystem drivs av överskottsenergin i motorns avgaser. Dettainnebär att temperaturvariationer i avgaserna orsakar variationer igenererad turbineffekt och därmed ökat laddtryck från turbosystemet.Används informationen om den tillgängliga energin i avgaserna när manstyr turbinen så kan man motverka oväntade laddtrycksförändringar. Idenna rapport har en modellbaserad turboregulator med en framkopplingsom beräknar en önskad turbineffekt från givet referenstryckutvecklats. Sedan tas en styrsignal fram till turbinen som, genom attanvända informationen om den observerade energin i avgaserna, matcharden önskade turbineffekten. En model av en medelvärdesmotor haranvänds för att validera prestandan i regulatorn via stegsvar mellanolika referenstryck. Det har även utförts tester i bil för att avgöraom resultatet blir detsamma under verkliga förhållanden.

Place, publisher, year, edition, pages
2011. , 43 p.
Keyword [en]
Turbo, Controller, Model based, MVEM, Wastegate, Variable geometry turbine
Keyword [sv]
Turbo, Regulator, Modellbaserad, Medelvärdesmotor
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-70682ISRN: LiTH-ISY-EX--11/4511--SEOAI: oai:DiVA.org:liu-70682DiVA: diva2:441994
Subject / course
Vehicular Systems
Presentation
2011-09-07, Linköping University, Linköping, 13:15 (Swedish)
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-09-23 Created: 2011-09-14 Last updated: 2011-10-18Bibliographically approved

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